In recent years, the scale and speed of underground space construction have grown rapidly, and the development of deep underground spaces has become increasingly frequent. Under the background of the national spatial planning system, the urban underground space planning of Guangzhou city adheres to the people-centered approach, bottom line thinking, coordinated development, and safety, and explores the system and methods for preparing the underground space planning of super large cities. Firstly, the safety bottom line, resource protection bottom line, and control bottom line range are proposed as areas where underground space is not suitable for construction; Priority should be given to safety and comprehensive resource assessment should be carried out to determine suitable construction areas for underground spaces and general construction areas; To coordinate the comprehensive utilization of underground space, functional composite three-dimensional layering, graded zoning and classification guidance; To achieve deep integration of above ground and underground facilities, infrastructure+ is proposed based on the characteristics of underground facilities; To build a safe and resilient underground space, identify disaster risks, classify and stage safety prevention measures, and coordinate above ground and underground disaster prevention and reduction facilities; To improve the efficiency of planning and control, and assist in the sustainable development of underground spaces, it is proposed to strengthen the guarantee mechanism.